definitivno nikola...eve eden vistiski objektiven covek koj sepak pravilno go razbral brakot....
a LGBT e dizis
Is There a Gay Brain? Imagine Study Finds Anatomical Clues
[Neuroscience researchers] found that the brains of homosexual men and heterosexual women were more symmetrical than the brains of heterosexual men and homosexual women. A similar difference emerged when the researchers looked in particular at the amygdala, a brain region associated with emotional reactions. Heterosexual women and homosexual men had more connections between their right and left amygdala and more connections with other brain regions than did homosexual women and heterosexual men.
Scientists have spent decades looking for brain differences between homosexual and heterosexual people and since the early 1990s have been finding
anatomical distinctions in regions associated with sexual behavior. The new study suggests broader brain differences between homosexual and heterosexual men and women, even in regions not linked to sexual attraction.
The BBC article where I first read of this study can be found
here.
In this 2005 study, it was discovered — as the title of the article says — that “the brains of homosexual men respond more like those of women when reacting to a chemical derived from the male sex hormone
ponatamu (hem-hetero a hom homo)
In contrast, by using both
Magnetic Resonance Imaging (
MRI) and
Positron Emission Tomography (
PET), Slavic and Lindström were able to accurately observe activity deep in the interior of the brain—from the
abstract available online:
Ninety subjects [25 heterosexual men (HeM) and women (HeW), and 20 homosexual men (HoM) and women (HoW)] were investigated with magnetic resonance volumetry of cerebral and cerebellar hemispheres. Fifty of them also participated in PET measurements of cerebral blood flow, used for analyses of functional connections from the right and left amygdalae.
There are major differences in the methodology of this new research (other than the obvious use of living subjects). • there are more than twice as many subjects in this new study – 41 v. 90 • the interior structures – LeVay's hypothalumus (involved in
hormonal responses) v. Salvic and Lindström's amygdala (center of deeply ingrained fight / flight and other emotional responses / bonds) • the use of MRI and PET to
directly measure the size of the structure as a
result of its function between subjects v. LeVay's positing of size differences based on past (living) hormonal activity
Stanford.edu
Process Connection Between Brain Structures
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However, both studies are important in that they measure the size of brain structures that have a relatively fixed and predictable growth rate. Both the
hypothalamus and
amygdala are located deep at the base of the brain and are involved in the processing and effect of emotions, although the amygdala functions as the 'controller' rather than a contributor, and tend to reach their maximum size at the onset of full adulthood. The larger brain mass that we are most familiar with (frontal, parietal, temporal lobes, etc.) continues to change in size and density from birth through the 30's and 40's, as it acts as a storehouse for memory, motor function, and other life experiences that continue to effect its development. This new study measures the number of connections made within the amygdala's left and right hemispheres (hence its overall size), thereby showing
21 vek sme.
greska si biseksualcite se palat i na dvata pola....duri ima tezi deka covokot po priroda e bi-sustestvo...no so znam
.
